The Ski Nautique Big Dawg World Tour, presented by O'Brien, consists of four qualifying events and a series final championship. The series is open to slalom skiers 35 years of age or older who have not placed in the top 10 in a professional water ski tournament in the past three years. The series final championship includes two rounds of 34 mph record-capable slalom action, followed by a heart pounding, bracketed, 16-skier, head-to-head finale.